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217 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced
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272 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

217 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

204 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

182 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

212 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

232 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

160 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

192 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

155 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced